Metadata Report for BODC Series Reference Number 1097634

Metadata Summary

Data Description

Data Category Meteorology -unspecified
Instrument Type
Vaisala HMP temperature and humidity sensor  meteorological packages
Vaisala PTB100 barometric pressure sensor  meteorological packages
Vaisala WAA151 cup anemometer  anemometers
Vaisala WAV151 wind vane  anemometers
Kipp and Zonen CM6B pyranometer  radiometers
Skye Instruments SKE510 PAR energy sensor  radiometers
Instrument Mounting research vessel
Originating Country United Kingdom
Originator Dr Ian Brooks
Originating Organization University of Leeds School of Earth and Environment
Processing Status QC in progress
Online delivery of data Download not available
Project(s) UKSOLAS

Data Identifiers

Originator's Identifier D317_PRODQXF_MET
BODC Series Reference 1097634

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2007-03-21 11:41
End Time (yyyy-mm-dd hh:mm) 2007-04-12 09:01
Nominal Cycle Interval 30.0 seconds

Spatial Co-ordinates

Southernmost Latitude 38.56633 N ( 38° 34.0' N )
Northernmost Latitude 60.01100 N ( 60° 0.7' N )
Westernmost Longitude 26.17367 W ( 26° 10.4' W )
Easternmost Longitude 4.38350 W ( 4° 23.0' W )
Positional Uncertainty 0.0 to 0.01 n.miles
Minimum Sensor or Sampling Depth -18.5 m
Maximum Sensor or Sampling Depth -18.5 m
Minimum Sensor or Sampling Height -
Maximum Sensor or Sampling Height -
Sea Floor Depth -
Sea Floor Depth Source -
Sensor or Sampling Distribution Fixed common depth - All sensors are grouped effectively at the same depth which is effectively fixed for the duration of the series
Sensor or Sampling Depth Datum Instantaneous - Depth measured below water line or instantaneous water body surface
Sea Floor Depth Datum -


BODC CODERankUnitsTitle
AADYAA011DaysDate (time from 00:00 01/01/1760 to 00:00 UT on day)
AAFDZZ011DaysTime (time between 00:00 UT and timestamp)
ALATGP011DegreesLatitude north (WGS84) by unspecified GPS system
ALONGP011DegreesLongitude east (WGS84) by unspecified GPS system
CAPHSL011MillibarsPressure (measured variable) exerted by the atmosphere by barometer and correction to sea level
CDTASS011Degrees CelsiusTemperature of the atmosphere by dry bulb thermometer
CRELSS011PercentRelative humidity of the atmosphere by humidity sensor
CSLRR1XS1Watts per square metreDownwelling vector irradiance as energy of electromagnetic radiation (solar (300-3000nm) wavelengths) in the atmosphere by pyranometer and taking the maximum value from two or more sensors
DWIRRXMX1Watts per square metreDownwelling vector irradiance as energy of electromagnetic radiation (PAR wavelengths) in the atmosphere by cosine-collector radiometer and taking the maximum value from two or more sensors
ERWDSS011DegreesDirection (from) of wind relative to moving platform and heading {wind direction} in the atmosphere by in-situ anemometer
ERWSSS011Metres per secondSpeed of wind relative to moving platform and heading {wind speed} in the atmosphere by in-situ anemometer
EWDASS011Degrees TrueDirection (from) of wind relative to True North {wind direction} in the atmosphere by in-situ anemometer
EWSBSS011Metres per secondSpeed of wind {wind speed} in the atmosphere by in-situ anemometer

Definition of Rank

  • Rank 1 is a one-dimensional parameter
  • Rank 2 is a two-dimensional parameter
  • Rank 0 is a one-dimensional parameter describing the second dimension of a two-dimensional parameter (e.g. bin depths for moored ADCP data)

Problem Reports

No Problem Report Found in the Database

Data Access Policy

Public domain data

These data have no specific confidentiality restrictions for users. However, users must acknowledge data sources as it is not ethical to publish data without proper attribution. Any publication or other output resulting from usage of the data should include an acknowledgment.

The recommended acknowledgment is

"This study uses data from the data source/organisation/programme, provided by the British Oceanographic Data Centre and funded by the funding body."

Narrative Documents

Kipp and Zonen Pyranometer Model CM6B

The CM6B pyranometer is intended for routine global solar radiation measurement research on a level surface. The CM6B features a sixty-four thermocouple junction (series connected) sensing element. The sensing element is coated with a highly stable carbon based non-organic coating, which delivers excellent spectral absorption and long term stability characteristics. The sensing element is housed under two concentric fitting Schott K5 glass domes.


Dimensions (W x H) 150.0 mm x 91.5 mm
Weight 850 grams
Operating Temperature -40°C to +80°C
Spectral Range 305 - 2800 nm
(50% points)
Sensitivity 9 -15 µV/W/m2
Impedance (nominal) 70 - 100 ohm
Response Time (95%) 30 sec
Non-linearity < ± 1.2% (<1000 W/m2)
Temperature dependence of sensitivity < ± 2% (-10 to +40°C)
Zero-offset due to temperature changes < ± 4 W/m2 at 5 K/h temperature change

Skye Instruments PAR Energy Sensor Model SKE 510

The SKE 510 is suitable for measuring photosynthetically active radiation (PAR) from natural or artificial light sources. The sensor is fully waterproof and guaranteed submersible to 4m depth, and indoor versions are also available.

The instrument uses a blue-enhanced planar diffused silicon detector to measure energy (in W m-2) over the 400-700 nm waveband. It has a cosine-corrected head and a square spectral response. The sensor can operate over a temperature range of -35 to 70 °C and a humidity range of 0-100% RH.


Sensitivity (current) 1.5µA or 100 W m-2
Sensitivity (voltage) 1mV or 100 W m-2
Working Range 0-5000 W m-2
Linearity error 0.2%
Absolute calibration error typ. less than 3%
5% max
Response time - voltage output 10 ns
Cosine error 3%
Azimuth error less than 1%
Temperature co-efficient ±0.1% per °C
Internal resistance - voltage output c. 300 ohms
Longterm stability ±2%
Material Dupont 'Delrin'
Dimensions 34 mm diameter
38mm height
Cable 2 core screened
7 - 2 - 2C
Sensor Passband 400 - 700 nm
Detector Silicon photocell
Filters Glass type and/or metal interference

Vaisala Analog Barometers Models PTB100 (A), (B) and PTB101 (B), (C)

The PTB 100 series analog barometers are designed both for accurate barometric measurements at room temperature and for general environmental pressure monitoring over a wide temperature range. The long-term stability of the barometer minimizes the need for field adjustment in many applications.

Physical Specifications

Size 97 x 60 x 22 mm
Weight 85g

The barometers use the BAROCAP* silicon capacitive absolute pressure sensor developed by Vaisala for barometric pressure measurements. The BAROCAP* sensor combines the elasticity characteristics and mechanical stability of a single-crystal silicon with the proven capacitive detection principle.

Sensor Specifications

Model Number Pressure Range
Temperature Range
Humidity Range Total Accuracy
PTB100A 800 to 1060 -40 to +60 non-condensing +20 °C ± 0.3 mbar
0 to +40 °C ± 1.0 mbar
-20 to +45 °C ± 1.5 mbar
-40 to +60 °C ± 2.5 mbar
PTB100B 600 to 1060 -40 to +60 non-condensing +20 °C ± 0.5 mbar
0 to +40 °C ± 1.5 mbar
-20 to +45 °C ± 2.0 mbar
-40 to +60 °C ± 3.0 mbar
PTB101B 600 to 1060 -40 to +60 non-condensing +20 °C ± 0.5 mbar
0 to +40 °C ± 1.5 mbar
-20 to +45 °C ± 2.0 mbar
-40 to +60 °C ± 3.0 mbar
PTB101C 900 to 1100 -40 to +60 non-condensing +20 °C ± 0.3 mbar
0 to +40 °C ± 1.0 mbar
-20 to +45 °C ± 1.5 mbar
-40 to +60 °C ± 2.5 mbar

* BAROCAP is a registered trademark of Vaisala

Vaisala Temperature and Relative Humidity HMP Sensors

A family of sensors and instruments (sensors plus integral displays or loggers) for the measurement of air temperature and relative humidity. All are based on a probe containing a patent (HUMICAP) capacitive thin polymer film capacitanece humidity sensor and a Pt100 platinum resistance thermometer. The probes are available with a wide range of packaging, cabling and interface options all of which have designations of the form HMPnn or HMPnnn such as HMP45 and HMP230. Vaisala sensors are incorporated into weather stations and marketed by Campbell Scientific.

All versions operate at up to 100% humidity. Operating temperature ranges vary between models, allowing users to select the version best suited to their requirements.

Further details can be found in the manufacturer's specification sheets for the HMP 45 series, HMP 70 series and HMP 230 series.

Vaisala WA15 Wind Set

The WAA151 combines a WAA151 anemometer and a WAV151 wind vane, to measure wind speed and direction.

WAA151 Anemometer

The anemometer has three lightweight conical cups in the cup wheel. A wind-rotated chopper disc, attached to the cup wheel's shaft, cuts an infrared light beam 14 times per revolution, generating a pulse output from a phototransistor. The output rate can be regarded as directly proportional to the wind speed. However, for the best accuracy, a transfer function is used to compensate starting inertia and slight over-speeding:

Uf = 0.328 + 0.101 x R, where Uf = wind speed and R = output pulse rate

A thermostatically controlled heating element in the shaft tunnel prevents the bearings from freezing in cold environments.

WAV151 Wind Vane

The WAV151 is a counter-balanced optelectronic wind vane. Infrared LEDs and phototransistors are mounted in six orbits around a 6 bit Gray coded disc. Turned by the vane, the disc determines the code received by the phototransistors.


  WAA151 Anemometer WAV151 Wind Vane
Measurement range 0.4-75 m s-1 0-300° (at 0.4-75 m s-1)
Starting threshold < 0.5 m s-1 < 0.4 m s-1
Resolution - ±2.8°
Accuracy ±0.17 m s-1 (within range 0.4-60 m s-1) < ± 3°
Output 0-750 Hz square wave 6 bit parallel Gray code
Operating temperature -50°C to 55°C -50°C to 55°C

Further details can be found in the manufacturer's specification document.

UK SOLAS Discovery Cruise D317 Underway Meteorology and Surface Hydrography Document

Underway data for D317 were provided to BODC by NMF-SS personnel.


Navigation and bathymetry

Instrument Type Code Main role
Trimble Navigator 4000 GPS GPS_4000 Navigation
Ashtec G12 GPS GPS_G12 Navigation (1st choice for Bestnav)
Ashtec Attitude Detection Unit 2 GPS GPS_ASH Navigation
Gyrocompass Gyrocompass GYRONMEA Relative motion
Chernikeef Log EM Log LOG_CHF Relative motion


Sensor Serial Number Last calibration date
Vaisala Barometer PTB100A U1850012 or S3610008 -
Vaisala Temperature/Humidity HMP44L A2150009 -
Skye PAR (port) 28558 21/12/2004
Skye PAR (starboard) 28557 21/12/2004
Kipp & Zonen TIR CMB6 (port) 47463 22/12/2004
Kipp & Zonen TIR CMB6 (starboard) 47462 22/12/2004
Vaisala Anemometer WAA151 P50421 -
Vaisala Wind Vane WAV151 S21208 -

Surface hydrography

Sensor Serial number Last calibration date
FSI OTM Housing temperature - -
FSI OTM Remote temperature - -
FSI OCM Conductivity - -
Wetlabs Fluorometer - -
Seatech Transmissometer CST-112R 31/05/1996

Originator's Data Processing

Raw data were logged to NetCDF format through the ship's Techsas system. Data were converted to RVS binary format on a daily basis, for manual data processing, including merging the navigation streams, deriving absolute winds and salinity, and correcting bathymetric depth data. Data were supplied to BODC in Techsas NetCDF, RVS binary, and also RVS listit ASCII formats.

Navigation and bathymetry

Three GPS systems were used on the ship. These are treated hierarchically, with two used as backups to the first. The standard processing software, Bestnav, identifies gaps in the preferred GPS stream, and fills them with data from the second choice stream, and then, if necessary, the third choice.


Meteorological data were collected from sensors mounted at 18.5 m height on the foremast platform. The ship's heading and course over ground were used to correct relative wind data to absolute values.

Surface hydrography

The surface water component consisted of a flow through system with a pumped pickup at 5 m depth. The TSG was set to a flow rate of 25 L/min, and the fluorometer and transmissometer to a flow rate of 3 L/min. The TSG housing temperature and conductivity were used to derive salinity.

BODC Data Processing

All parameters were visually screened, and spikes flagged as suspect. Screening took into account comparisons between different parameters, and the environmental context.

Navigation and bathymetry

Bestnav latitude and longitude had some gaps, even where the raw GPS channels were continuous. These included two major data losses, attributed to failures of the Techsas system 00:00-09:44 02/04/2007 and 00:00-15:57 07/04/2007. BODC filled these gaps with concurrent data from the Fugro G12 GPS. The position data were used to generate ship speeds, which were in turn screened for improbable values in order to identify small spikes in latitude and longitude. Any remaining small gaps were filled by interpolation.

Bathymetric data from the echo sounder were screened in comparison with GEBCO bathymetry.


BODC applied manufacturers' calibrations to the pyranometers and PAR sensors. Port and starboard PAR were merged, taking the maximum measured value from the pair for each cycle, to eliminate the ship's shading effect. Port and starboard TIR were merged in the same way.

Wind data were screened with reference to the ship's heading, to account for the sheltering effect of the ship. Air temperature data were also screened with reference to heading, to identify instances of stack pollution.

Sea surface hydrography

TSG salinity was calibrated against independent bottle sample salinity data. A calibration data set of 16 data pairs was analysed. There was no significant trend in instrument response with time, and there was a simple, very small offset between bottle salinity and TSG salinity. BODC has therefore applied a mean offset calibration to the TSG salinity:

PSALSG01 = PSALSU01 - 7.5 x 10-5 (BODC calibration 6289)

No independent measurements were made with which to calibrate the in situ fluorometer. This parameter has been left as the raw instrument output voltage.

Quality control report

Navigation and bathymetry

Bathymetry data from the echosounder were very sparse.


No data quality issues to report.

Sea surface hydrography

No data quality issues to report.

Project Information

UK Surface Ocean Lower Atmosphere Study

The UK Surface Ocean Lower Atmosphere Study (UK SOLAS) is the UK's contribution to the international SOLAS programme.

UK SOLAS formed interdisciplinary teams to address three primary aims

UK SOLAS started in 2003, to run for seven years. The programme was funded by the Natural Environment Research Council.

Funded projects

In total, 19 projects have been funded by UK SOLAS, over four funding rounds.

Project Title Short Title Principal Investigator
Impact of atmospheric dust derived material and nutrient inputs on near-surface plankton microbiota in the tropical North Atlantic Dust Eric Achterberg
The role and effects of photoprotective compounds in marine plankton - Steve Archer
Field observations of sea spray, gas fluxes and whitecaps SEASAW Ian Brooks
Factors influencing the biogeochemistry of iodine in the marine environment - Lucy Carpenter
Global model of aerosol processes - effects of aerosol in the marine atmospheric boundary layer GLOMAP Ken Carslaw
Ecological controls on fluxes of dimethyl sulphide (DMS) to the atmosphere - David Green
Dust outflow and deposition to the ocean DODO Ellie Highwood
Investigation of near surface production of iodocarbons - rates and exchanges INSPIRE Gill Malin
Reactive halogens in the marine boundary layer RHaMBLe Gordon McFiggans
The role of bacterioneuston in determining trace gas exchange rates - Colin Murrell
Measuring methanol in sea water and investigating its sources and sinks in the marine environment - Phil Nightingale
The impact of coastal upwellings on air-sea exchange of climatically important gases ICON Carol Robinson
The Deep Ocean Gas Exchange Experiment DOGEE Rob Upstill-Goddard
High wind air-sea exchanges HiWASE Margaret Yelland
Aerosol characterisation and modelling in the marine environment ACMME James Allan
3D simulation of dimethyl sulphide (DMS) in the north east Atlantic - Icarus Allen
Processes affecting the chemistry and bioavailability of dust borne iron - Michael Krom
The chemical structure of the lowermost atmosphere - Alastair Lewis
Factors influencing the oxidative chemistry of the marine boundary layer - Paul Monks

UK SOLAS has also supported ten tied studentships, and two CASE studentships.


UK SOLAS fieldwork has included eight dedicated research cruises in the North Atlantic Ocean. Continuous measurements were made aboard aboard the Norwegian weather ship, Polarfront, until her decommission in 2009. Time series have been established at the SOLAS Cape Verde Observatory, and at the Plymouth Marine Laboratory L4 station. Experiments have taken place at the Bergen mesocosm facility.

A series of collaborative aircraft campaigns have added complementary atmospheric data. These campaigns were funded by UK SOLAS, African Monsoon Multidisciplinary Analyses (AMMA-UK), Dust and Biomass Experiment (DABEX) and the Facility for Airborne Atmospheric Measurements (FAAM).


Surface Ocean Lower Atmosphere Study

The Surface Ocean-Lower Atmosphere Study (SOLAS) is an international research initiative comprising over 1500 scientists in 23 countries. Its central goal is to understand the biogeochemical-physical interactions between the ocean and atmosphere, and how their coupling affects, and is affected by climate change.

UK SOLAS, Field Observations of Sea Spray, Gas Fluxes and Whitecaps (SEASAW)

This project was led by the University of Leeds, in association with the National Oceanography Centre, Southampton, and the University of the Highlands and Islands. SEASAW aimed to measure gas and particle fluxes across the air-sea interface, and to determine their dependence on environmental factors.

Fieldwork comprised one dedicated open ocean research cruise: D317, and participation in another UK SOLAS cruise: D313. The observational data include:

More detailed information on this project may be found in the official cruise reports for D313 and D317.


Data Activity or Cruise Information


Cruise Name D317
Departure Date 2007-03-21
Arrival Date 2007-04-12
Principal Scientist(s)Ian Brooks (University of Leeds School of Earth and Environment)
Ship RRS Discovery

Complete Cruise Metadata Report is available here

Fixed Station Information

No Fixed Station Information held for the Series

BODC Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:

Flag Description
Blank Unqualified
< Below detection limit
> In excess of quoted value
A Taxonomic flag for affinis (aff.)
B Beginning of CTD Down/Up Cast
C Taxonomic flag for confer (cf.)
D Thermometric depth
E End of CTD Down/Up Cast
G Non-taxonomic biological characteristic uncertainty
H Extrapolated value
I Taxonomic flag for single species (sp.)
K Improbable value - unknown quality control source
L Improbable value - originator's quality control
M Improbable value - BODC quality control
N Null value
O Improbable value - user quality control
P Trace/calm
Q Indeterminate
R Replacement value
S Estimated value
T Interpolated value
U Uncalibrated
W Control value
X Excessive difference

SeaDataNet Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:

Flag Description
0 no quality control
1 good value
2 probably good value
3 probably bad value
4 bad value
5 changed value
6 value below detection
7 value in excess
8 interpolated value
9 missing value
A value phenomenon uncertain
Q value below limit of quantification